and it is no coincidence that president obama today is invoking dr. king's legacy calling on americans to do something for each other on a national day of service. brian moar reports from washington. >> reporter: on a day of national service, president obama led by example. he and the first lady volunteered at a local elementary school. he was honoring the life and legacy of dr. martin luther drink, just like he did before his first inauguration. >> it's a symbol of how our democracy works and how we peacefully transfer power, but it should also be an affirmation that we're in this together. >> not far away the vice president and a bunch of bidens helped to pack supply kits for the u.s. military. an estimated 250,000 people today did something to help somebody else. in rochester, there was a clothing drive in manhattan, volunteers added a little life to the walls of a senior center. in orlando the groassroots services were literal. former first daughter chelsea clinton encouraged people to do more than just celebrate on this inauguration weekend. some